Removable saw-tooth



(No Model.)

P. GARDE?. REMOVABLE SAW TOOTH.

No. 409,271. PaLte'Ilted Aug. 20, 1889.

Suva/144; oz

aTnNT FFICE@ PATRICK OARDIFF, OF ASTORIA, OREGON.

REMOVABLE SAW-TOOTH.

SPECIFICATION forming part of Letters Patent No. 409,271, dated August20, 1889.

Application filed March 6, 1889. Serial No. 302,088. (No model.)

To all tlf/tom t mfr/y concern.-

Be it known that I, PATRICK CARDIN, a citizen of the United States,residing at Astoria, in the county of Olatsop and State of Oregon, haveinvented certain new and nseful Improvements in Insertible and RemovableTeeth for Circular and Upright Saws; and I do declare the following tobe a full, clear, and eXact description et the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompany'- ing drawings, and tothe letters and figures of reference marked thereon, which form a partof this specification.

The invention relates to improvements in removable saw-teeth forcircular saws; and it consists in the construction and novel arrangementof parts, as hereinafter set forth, illustrated in the accompanyingdrawings, and pointed out in the appended claims.

The object of my invention is to so construct the tooth and itslocking-plate that when fitted in position said tooth will be iirmlylocked and a support formed for the tooth at the point where thegreatest st-rain is exerted upon the tooth.

A further object of my invention is to provide the tooth andlocking-plate with a V- shaped groove, said groove being formed in theedge of the tooth and plate adjacent to the saw proper, a V-shaped tenonof the latter being adapted to iit within said groove of the tooth andthe locking-plate, and thus form a lock against any lateral displacementof these parts.

A further object of my invention is to so construct the tooth that thecutting-edge thereof will project a sufficient distance be- Fig. G, anend view of the same; Fig. 7, a side view complete, showing the wrenchin position.

Referring to the drawings, A indicates the saw proper7 cut away to formthe circular bearing-edge Band the reverse bearing-edge O.

D indicates the locking-plate, of the form shown, one edge having thecontour of the circular bearing-edge B, designed to tit snugly againstthe same, and a rectilinear edge E, to 'form a continuation of the likeedgeF of the saw A. Y

The locking-plate is cut away to ferm the straight edge II, and isprovided withasemicircular groove or notch M at the junction of saidedge and the curved edge D', for a purpose hereinafter explained.

I indicates the sawtooth, provided with t-he ogee-curved edge J, whichfor a portion of its length, when the tooth is in position, forms acontinuation of the curved edge D of the locking-plate D and has abearing against the curved edges B O of the saw. By this arrangement itwill be seen that the bearing`- edge O forms a support for the tooth atthe point where the greatest strain is exerted thereon, and thisconstitutes an important feature of my invention. The sawtooth isfurther provided with a rectilinear edge K, which has a bearing againstthe edge lll of the locking-plate, and a knuckle or teat L, which AFitswit-hin the selnicircular recess or notch M of the locking-plate. Thesaw-tooth is cut away at its front, as shown at N, to form acutting-edge N', projecting beyond the edge of the lockingplate, and isprovided with a shoulder O, which abuts against the nose of thelockingplate. The tooth also has a straight edge P, which forms acontinuation of the edge Q of the saw.

In order to secure the saw-tooth and its locking-plate against lateraldisplacement when in position, I form a Vshaped groove in the toothalong the edge J, and the locking-plate with a like groove along itscurved edge D, into which grooves is adapted to fit a V-shaped tenonformed on the saw proper along its circular edges B and O.

vIt will be understood that instead of forming the grooves in thelocking-plate and the IOO tooth and the ten on on the saw thisarrangement could be reversed and the same results obtained.

To form additional means for preventing lateral displacement of thetooth, the latter is provided with a V-shaped tenon along its edge K,which tits into a V-shaped groove of the locking-plate along the edge H.To facilitate the insertion of the tooth and the locking-plate, as Wellas the removal of these parts for any cause, I provide an opening R inthe locking-plate, adapted to receive an outstanding stud or lug S on aWrench T, which is also provided with a shoulder U, which, when theWrench is in place, bears against the curved edge WV of thelockingplate.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1S-

l. The combination, with a saw A, having the bearing-edges B C, of alocking-plate D, having a bearing-edge D of the contour of edge B, and astraight edge I'I, and the tooth I, having ogeecurved edge J and thestraight edge K, said parts being adaptedy to iit to gether in themanner described, and for the purposes speciiied.

2. The combination, With a saw A, having the bearing-edges B C, of thelocking-plate D, having a bearing-edge D of the contour of edge B, and astraight edge H, and the noteh'or recess M, the tooth I, having theogee-curved edge J, the straight edge K, and a teat adapted to titWithin said notch or recess, substantially as specified.

3. The combination, with a saw A, having bearing-edges B C, of thelocking-plate D, having bearing-edge D of the contour of edge B, astraight edge H, and a notch or recess M, and the tooth I, havingogee-curved edge J, the straight edge K, a teat adapted to iit Withinsaid notch or recess, and a shoulder O, Which abuts against the nose ofthe locking-plate, substantially as specified.

4. The combination, with a saw A, having bearing-edges B C and aV-shaped tenen along said edges, of the locking-plate D, havingbearing-edges D H and a V-shaped groove along said edges, and the toothI, having the grooved ogee-curved edge J and straight edge K, providedWith a tenon, said parts being adapted to iit together as speciiied.

5. The combination, with a saw A, having the bearing-edges B C, of alocking-plate D, havinga bearing-edge D of the contour of edge B, astraight edge H, and the curved bearing-edge WV, and the tooth I, havingogeecurved edge J and straight edge K, and the lcuttinop edge N)rojecting beyond the edge C D 7 1 n W of the locking-plate, for thepurpose specified.

In testimony whereof I have affixed my signature in presence of twowitnesses.

PATRICK CARDIFF. Witnesses:

G. C. FULTON, G. Z. BADoN.

